Tail stock



No v. 24, 1931. E. F. BATTERMAN ET AL 1,833,602

TAIL STOCK Filed May 10, 1950 5 Sheets-Sheet 1 '7 Nov. 24, 1931. E. F. BATTERMAN ETAL 1,333,602

TAIL STOCK Filed May 10. 1950 5 Sheets-Shee 2 gmmtw $6M ram MM Nov. 24, 1931. E. F. BATTERMAN ET AL 1,333,602

TAIL STOCK Filed May 10. 1930 SSheQtS-ShBQ 3 .90 87 59 574 I? I \l 89 I 85 H I w. is l if a 4/ J3 7/ Z9 M 4v 8/ 7,? 90 am 83 34 ,eg a I1 Oji- 28 v "1' 8/ l 82 A, F gmntov a 49 7 KM Nov. 24, 1931. E. F. BATTERMAN ET AL 1,333,602

TAIL STOCK File d May 10. 1930 5 Sheets-Shee 4 1931- E. F. BATTERMAN ET AL 1,333,602

TAIL STOCK Filed May-10; 1930 5 Sheets-Sheet 5 Patented Nov. 24, 1931 UNITED STATES;

PATENT oFricE ELMCER F. IBATTERMAN, OF EAST CLEVELAND, AND JOSEPH VERDERBER, OF CLEVE- LAN D, OHIO,- ASSIGNORS TO THE CLEVELAND UNIVERSAL JIG COMPANY, OF CLEVE- LAND, OHIO, A CORPORATION OF OHIO TAIL STOCK Application filed May 10,

This invention relates to an improved construction of tail stock for use in connection with a lathe of the type disclosed in our prior application Serial No. 406,783, filed Novemher 13, 1929. In this'construction itis desirable that the tail stock center be pivotally mounted so that the same can be moved out of the way for inserting the Work.

The principal object of the invention is to provide such av tail stock assembly which shall be simple and eflicient, give long wear and hold the tail stock center exactly in i proper working position;

A further object is to provide such an as sembly which shall embody several features making for convenience in use.

Other and more specific objects will appear from the following description and from the draw ngs. Referring to the accompanying drawings, l isa side elevation of our improved tail stock assembly; Fig. 2 is a top plan view showing one of the control levers in section; Fig.3 is a top plan view like Fig. 2

T butshowing one of the operating handles in 6 different working position; Fig. 4 is a plan point; Fig. 9 is a vertical sectional view through the pinion which operates the tail stock center; Fig. 10 isa horizontal section 40' showing a locking means which allows movement of the pinion in both directionsby an operating handle but in only one direction by force applied through said pinion; Fig. 11 is a view similar to Fig. 8 but showing the pivotal portion in unlockedposition completely rotated through its pivotal. arc; Fig. 12 is a perspective view of a portion ofthe base 'membershowing the pivot bearings, the means for lockingthe pivotal portion in position andthe stop which limits the pivotal 1930. Serial No. 451,228.

movement thereofyFig. 13 is a perspective view of. a block upon which one of the latch members is mounted; and Fig. 14 is a perspective View showing a portion of the lockmg means adapted to be attached inthe longitudinal recess shown in Fig. 12.

As stated, this tail stock assembly is adapted to be used in connection with a complete lathe such as that shown in our above-mentioned co-pending application. The centering mechanism and parts carried thereby are mounted on a base plate 10'which has on the bottom thereof a rib or guide portion 11 adapted to cooperate with a complementary groove in the lathe bed and be secured against removal by any suitable means such as a gib (not shown). This base member carries upstanding bearing members or lugs 12 and 13 provided with suitable holes 14 and 15 drilled therein to receive a suitable pin. A stop 16 is also carried by the base and adapted to cooperate with a portion of the pivotal part of the assembly to limit movement thereof in a manner to be hereinafter described. The base is provided with a cutaway or depressed portion or groove 17 (best seen in Figs. 11 and 12) and a second depressed portion or groove 18 perpendicular thereto in which may be secured in any suitable manner a member 19 (see Fig. 14) which cooperates with the groove 17 to provide an abutment. under which a locking latch may engage in a manner hereinafter to appear. The memher 19 is provided with a beveled central portion 20 adapted to guide a locking latch into engaging position, and upstanding portions 21. 22 adapted to prevent endwise movement of the pivotal portion'by reason of engagement with the forward portion of the U shaped member 23 which is secured to the pivotal portion and provided with suitable holes 24 and 25 in the legs of the U to receive a pin upon which the latch member referred to is pivotally mounted.

The pivotal portion referred to includes a main casting or barrel 28 which carries bearing lugsj29 and 30 connected to the barrel portion'by means of a web 31 which is provided with reinforcing portions 32 and33 also connecting the portions 29 and 30 to the barrel portion 28. The barrel portion is accurately drilled to receive a cylindrical tail stock center 34 which is provided with rack teeth and carries a centering pin 36 in the usual manner as indicated in Fig. 5. Passing through the openings 14 and 15 and also through openings in the bearing portions 29 and 30 is a pivot pin 38 which is'the main pivotal mounting for the movable portion of the tail stock assembly. Mounted onthe rear end of the barrel portion 28yis a cap @0- secured thereto in any suitable manner and adapted to enclose the portion of the-tail stock center 34 which may project rearward ly through said barrel and has a screw 41 threaded through the end thereof, secured imposition by lock nut and adapted to form a stop to prevent the member 34 from being moved too far rearwardly when the same is disengaged from the work. The bar rel member 28 is also provided with an open ing 45 drilled therethrough and adapted to receive a pinion it) the teeth of which mesh with the teeth 85 0f the rack for advancing and withdrawing the centering pin 36. The

' drilled portion 45 communicates with an enlarged cylindrical'opening 48 also formed in frusto-conical face 57 above which extends a shank 58 having a threaded upper end adapted to receive nut 59 and lock nut 60. (The specific structure and operation of the ratchet member shown in Fig. 10 will be hereinafter described.) Bearing frictionally upon the frusto-conical surface 57 is a mem ber 61 which is integral with the handle 62 and'is provided with a fru'sto-conical de- 7 pression adapted" to cooperate with the frusto-conical portion to provide a friction clutch. v A spring 63 is urged downward against themem'ber 61 by means of a cap 64 held in spring pressing position by the nut 59. ,It will be seen from the foregoing that rotary motion of the handle 62 will result in driving the pinion 46 through a friction clutch and that this motion is further con trolled by the ratchet or locking'means 50 to permit movement in either direction by the handle 62 and toprevent movement rear:

wardly of the member and to allow forwardmovement thereof by pressure applied on. the rack 35. 7 7 7 As will beseen by reference to Fig. 7

The upper portion 56 of especially, the barrel portion has a bore near the front end thereof which intersects slightly with the bore in which the tail stock center 3% is received. A bolt 71 having an enlarged head 72 and an elongated washer 73' are received in the bore 70 for the purpose of locking the centering means As shown, the head 72 and the washer 73 have wedging faces adapted'to grip the member Sid-when theyare pressed tightly'together. Threaded on the shank portion of the bolt 71 is a lever 7 provided with an enlarged nut portion 7 5 at one'end thereof for the purpose of forcing the washer and the head 72into gripping contact with the member 3%. As :best seen in Fig. 1, the lever 74 is provided with an upturned portion 76 which cooperates with cams on the handle for the purpose of locking and unlocking the tailstock centering member which carries the teeth lteferrin to Fi 2 and Fi 3 it O b b 7 will be seen that when thehan'dle 62 is ro- :tated clockwise,'the cam portions 77 and 78 thereof will operate rotate the lever 74 counter-clockwise, that is, into locking position. Clockwise movement of the handle 62 results in moving the center member 34: to Work holding position, and since the handleis connected to the pinion 4:6 through a friction clutch, it, is only necessary to proportion the parts so that the centering pin 86 comes into work holding position before the handle 62 is moved to the limit of its'throw in a clockwise direction. ns soon as the centering pin comes thus into' work holding position, thehandlewill slip on the friction clutch and may be further rotated to bring the lever .7 1 into complete loc ing position. lVhen the handle 62 is moved in the opposite direction, that is, countenclockwise, the f rst operation will be to loosen the nut 75 to .a suflicient extent that the member 34 can slip past the bolt head and washer 72' and 7 3, after which the friction'in the clutch'will be suflicientto cause withdrawal of themeinber 34. When the member 3a abuts the screw 41 its motion will be stopped and if the handle is further rotated, the only result will be slipping of the faces of the friction clutch against each other. i .r Also mounted on'the pin 38 isa lever member 80 which is provided with a pivoting means 81 at the lower end thereof adapted to connect with the link 82and which extends upwardly and forwardly when in locked position and terminates in a handle 83. Pivoted on a pin'S l which is received in the holes 24L and 25 in the member 23 (hereinbefore de scribed) is a latchingmember 85 which cooperates with the member 19 in the ca'm face 20'thereof to latch the pivotal portion of the lathe assembly in position. Thislatching member is connected by the link82 with the lever 80in a manner best seen ii -Figs. 6 8 11. vThehandle 88 has afgrooye 86 formedin the underside thereof and adapted to receive the extreme end of a locking han- V I dle 87. The handle 87 is pivoted at 88 to the lever80 and comprises a bifurcated portion 87 extending on the two sides of the lever 80 and adapted to hook over the upper end 58 ofthe bolt 58. A spring 89 guided by a rod 9O which passes through the lever 80 and bears against the member 87 constrains the members 88 and 87 to remain in separated position except when grasped and the member 87 pushed intocontact with the mem- V ber 83 against the resistance of the spring 89.

This locking mechanism serves to hold the pivotal portion in locked position until purposely unlocked by the operator.

-lVhen itisdesired'to pivot the tailstock assembly to its inoperative position, the hanber 19 and to a point at which the link 82 abuts the surface of the barrel 28 (best seen 7 in Fig. 8). After'this point is reached, the

20 cooperates with the latch to entire pivotal portion of the tail stock assembly rotates about the pin 88 as the lever 80 is pushed rearwardly. When pushed to the extreme rearward position, an abutment 90 on the barrel or casting 28 comes into abutting relation with the stop 16 and prevents further rotation of the barrel. When the lever 80 is returned to locking position, thecam guide the same into latching position.

Referring toFigs. 9 andlO, the member 56 which carries the conical clutch face 57 has attached to the bottom thereof a disk-v likeplate 91 which carries downwardly projecting portions54. The pinion 46 has integral therewith at the upperend a diskelike member 51 having a cross section shown in Fig. 10. Freely carried in the space between the member 54 and the member '51 are brake shoes 92. Positioned bet-Ween the brake shoes 92 and the member 51 aretoggle links 93'pivotally connected to the member 51 and the brake shoe 92', respectively, by ball or roller bearings, as clearly shown in Fig.'10.

These bearings. are positioned at different distances from the center of thepin 52 and are angularly spaced apart whereby motion in a clockwise direction imparted through the shaft 52 will tend to press the brake shoes .92 against the portion '50 of the casting 28.

' Set in suitable depressions in the members 51 are cups 94 pressed by springs 95 toward the brake shoes 92. It will thus be seen that rotation of the shaft 52 in both directions by thehandle 62 which drives the members 54 is possible without causing the, brake shoes to come into. locking engagement with the wall 51, but that rotation of the pinions 46 in a counter-clockwise direction (see Fig. 5)

will result in tightening of the brake shoes against the wall 50. It is thought unnecessary to go more deeply into the specific construction and operation of the clutch member of Fig. 10 since the same forms the subject matter of the co-pending application of Joseph. Verderber, Serial No. 301,191, and per se forms no part of this invention. The above description together with the showing in the drawings is thought a sufficient disclosure of this mechanism.

Carried on the lower side of the barrel 28 are suitable lugs 98 which may be cast integral with or threaded into the barrel 28 and which cooperate with similar lugs 99 on the base 10 to vertically position the barrel member, It is preferred that these lugs be threaded into the barrel and base portion so that they can be removed to compensate for wear.

While we have described the preferred embodiment of our invention we wish it understood that the same is merely illustrative and that the invention may be carried into effect in numerous variant forms within the scope ofthe appended claims.

Having thus described our invention, what weclaim is .1. A tailstock for a lathe including a base adapted for attachment to a lathe bed, a barrel pivotally carried by said base, a tailstock center adjustably carried in said barrel, means for releasably latching said barrel in centering position and a single means for first releasing said last means and then rotating said barrel about its pivotal mounting.

2. A tailstock for a lathe including a base adapted for attachment to a lathe bed, a casting pivotally carried by said base, a tailstock center adjustably carried by said casting, means for releasably latching said casting in centering position and a single means for first releasing said last means and then rotating said casting about its pivotal mounting.

3. A tailstock for a lathe including a base adapted for attachment to a lathe bed, acasting pivotally carried by said base. a tailstock center adjustably carried by said casting, means for locking said casting in centering position and asingle means for first releasing said last means and then rotating said casting about its pivotal mounting.

4. A tailstock for a lathe including a base adapted'for attachment to a lathe bed, a barrel pivotally carried by said base, a tailstock center adjustably carried in said barrel, means for releasably latching said barrel in centering position and a single means for first releasing said last means and then rotating said barrel about its pivotal mounting,

said tailstock center including a rack member received in said barrel, and a pinion car ried by said barrel and meshing with said rack member for adjustment of said tailstock center.

' 5. A ta lstock for a lathe including a base adapted for a tachment toga lathe bed, barrel pivotal y carried by said base, a tailstock center adjustably carried in said barrel,

ieans for releasably latching said barrel in centeringposition and a single means for first releasing said last means and then rotatin said barrel about its pivotal mounting, s'aic tail stockcenter including a rack member received in said barrel, a pinion carried by said barrel and meshing WVlllll said rack member for adjustment of said tailstock center, and means for rotating said pinion, said last means including a handle and a frictional driving connection between said handle and said pinion. 1

I 6. A tailstock for a lathe including a base adapted for attachment to a lathe bed, a barrel pivotally carried by said base, a tailstock center adjustably carried in said barrel, means for releasably latching said barrel in centering position and a single'means for first releasing said last means and then rotating said barrel about its pivotal mounting said tail stock center including a rack member received in said barrel, a pinion carried by said barrel and meshing with said rack member for adjustment of said tailstock center, and means for rotating said pinion, said last means including a handle having a driving connection With said pinion and a locking means controlling said pinion shaft and allowing movement in both directions by force applied to said handle but preventing movement of said rack member in a direction to Withdraw said tailstock center except by force applied through said handle.

7. A tailstock for a lathe including a base adapted for attachment to a lathe bed, a bar rel pivotally carried by said base, a tailstock center adjustably carried in said barrel, means for releasably latching said barrel in centering position and a single means for first releasing said last means and then rotating said barrel about its pivotal mou'nting, said tail stock center including a rack mem- I ber received in said barrel, a pinion carried by said barrel and meshing with said rack member for ad ustment of said 'tailstock center, and means for rotating saidpinion,

said last means including a handle having a frictional-driving connection with said pinion and a lockin ineans'controlling said pinion shaft and allowing movement in both direc-' tions by force applied to said handle but preventing movement of said rack member in a direction to Withdraw said tailstoclr center except by force applied through said handle.

8. A tailstocl: for a lathe including a base adapted forattachment to lathe bed, a bar rel pivotally carried by said base, a tailstoclr center adjustably carried in said barrel,

means for releasably latching said barrel in centering position and a single means for first releasing sald last means and then rotat' snssaeoe ing said barrel about its pivotal mounting, said tailstock center including a rack member received in said barrel, and a pinioncarried by said barreland meshing with said rack member for adjustment of said tails'tock center, said barrel carrying a gripping means and a lever for actuating same to lock said rack member in position.

7 9. A tailstockfor alathe including a base adapted for attachment to a lathe bed, a barrel pivotally carried by said base, a tailstock center adj ustably carried in said barrel, means for releasably latching said barrel in centering position and a single means for first releasing said last means and then rotating said barrel about-its pivotal mounting, said tail stock center including a rack member'received in said barrel, a pinion carried by said barrel and meshing withv said rack member for adjustment of said tailstock center, and means for rotating said pinion, said last means including a'ghandle and a frictional driving connection between said handle and said pinion, said barrel carrying a gripping means and a lever for actuating same to 1001: said rack member in position.

10. A tailstock for a lathe including a base adapted for attachment to a lathe bed, a barrel pivotally carried by said base, a 'tailstock center adjustably carried in said barrel, means for releasably latching said barrel in centering position and asingle means for first releasing said last means and thenrotating said barrel about its pivotal mounting, said tail stock center including a rack member received in said barrel, a pinion carried by said barrel'and meshing Withsaid rack member for adjustment of saidtailstock center, and means for rotating said pinion, said last means including ahandle having a driving connection with said pinion and a locking means controllingsaid pinion shaft and allowingmovement in both directions by-force applied to said handle'but preventing moveme'nt of said rack member in a direction to Withdraw said tailstoclr center except by force applied through said handle, said barrel carrying a gripping'means and a lever for actuating same tolo'ck said. rack member in position. a i r v 11. 'A tailstock for a latheincluding a base adapted for'attachm'ent to a lathe bed, a barrel pivotally carried by said base, a tailstocl: center adjustably carried j in said barrel,

means 'for releasably latching said barrel in centering position and a single means for first releasing saidlast means an'dthen rotatmg sa1d barrel'about its pivotal mounting,

said tail stock center including a rack member received in said barrel, a pinion carried by said barrel and meshing with said rack member for adjustment ofsaid tailstoclr center, and means for rotating said pinionfsaid last means including a handle having a fric tional driving connection with said pinion and I so - said pinion.

a locking means controlling said pinion shaft and allowing movement in both directions by force applied to said handle but preventing movement of said rack member in a direction to withdraw said tailstock center except by centering position and a single means for releasing said last means and rotating said barrel about its pivotal mounting, said tail stock center including a' rack member receivedin. said barrel, a pinion carried by said barrel and meshing with said rack member for adjustment of said tailstock'center, and means for rotating said pinion, said last means including handle and a frictional drivingconnection between saidhandle and said. pinion, said-barrel carrying a gripping means and a lever for actuating same to lock said rack member in position, said tailstocli including means whereby said handle operates said lever to lock and unlock said gripping means when it is actuated to operate 13. A tailstoclc for a lathe including a base adapted for attachment to a lathe bed, a barrel pivotally carried by said base, a tailstock center adjustably carried in said barrel, meansfor releasably latching said barrel in centering position and a single means for releasing said last means and rotating said barrel about its pivotal mounting, said tail stock center including a rack member received in said barrel, a pinion carried by said barrel and meshing with said rack member for adjustment of said tailstock center, and means for rotating said pinion, said last means including a handle having a driving connection with said pinion and a locking means controlling said pinion shaft and allowing movement in both directions by force applied to said handle but preventing movement of said rack member in a'direction to withdraw said tailstoclr center except by ,forceapplied through said handle, said barrel carrying a gripping means and a lever for actuating same to lock said rack member in position, said tailstock including means whereby said handle operates said lever to lock and unlock said gripping means when it is actuated to operate said pinion.

14. A tailstock for a lathe including a base adapted for attachment to a lathebed, a barrel pivotally carried by said base, a tailstock center adjustably carried in said barrel, means for releasably latching said barrel in centering position and a single means for releasing said last means and rotating said barrel about itspivotal mounting, said tail stock center includinga rack member received in said barrel, a pinion carried by said barrel and meshing with said rack member for adjustment of said tailstock center, and means for rotating said pinion, saidlastmeans including a handle having a frictional driving connection with said pinion and a locking means controlling said pinion shaft and allowing movement in both directions by force applied to said handle but preventing movement of'said rack member in a direction to withdraw said tailstock center except by force applied through said handle, said barrel carrying a gripping means and a lever for actuating same to lock said rack member in position, said tailstock including means whereby said handle operates said'lever to lock and unlock said gripping means when itis actuated to operate said pinion.

'15. A tailstock for a lathe including a base adapted for attachment to a lathe bed, a bar rel pivotally carriedaby said base, a tailstock center adjustably carried in said barrel,

means for releasably latching said barrel in rack member in position, said tailstock in cluding means whereby said handle operates said lever to lock and unlock said gripping means when it is actuated to operate said pinion, said last means including a cam carried by said handle.

16. A tailstock for a lathe including a base adapted for attachment to a lathe bed, a casting pivotally carried by said base, a tailstock center adjustably carried by said casting, means for locking said casting in centering position, a single means for first releasing said last means and then rotating said casting about its pivotal mounting, an upstanding member on said casting, said single means including a lever and said lever having mounted thereon means cooperating with said member carried by said casting to lock said single means in its casting locking position.

17. A tailstock for a lathe including a base adapted for attachment to a lathe bed, a barrel pivotally carried by said base, a tailstock center adjustably carried in said barrel, means for releasably latching said barrel in centering position and a single means for releasing said last means and rotating said barrel about its pivotal mounting, said tailstock center including a rack member re- 7 ceived in said barrel, and a pinion carried by said barrel and meshing with said rack member-for adjustment of said tailstoclrcen-V ter, said barrel carrying a gripping'means and a lever for actuating same to lock said rack member in position, said gripping meansincluding a bolt having a Wedging head, a Wedging Washer on said bolt, and said lever having a nut portion at one end threaded on said bolt.

18. A tailstock for a lathe including a base adapted for attachment to a lathe bed, a barrel pivotally carried by said base, a tailstock center adjustably carried in said barrel, means'for releasably latching said barrel in centering position and a single means for releasing said last means and rotating said barrel about its pivotal mounting, said tail stock center includlng a raclrmember received in said barrel, a pinion carried by said barrel and meshing with said rack member tor adJustment of sald tallstoclr center," and means for rotating said pinion, said" last v means including a handle'and a frictional driving connection between said handle and said pinion, said barrel carrying a gripping means and a lever for actuatingsame to lock said rackmeniber in position, said gripping means including a bolt having a Wedging head, a Wedging Washer on said bolt, and said lever havinga nut portion at one end threadedon said bolt.

In testimony whereof, We hereunto affix our signatures.

E. F. BATTER-MAN. JOSI. VERDERBERm 

